stoc/source/uriproc/ExternalUriReferenceTranslator.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <com/sun/star/lang/XServiceInfo.hpp>
  21 #include <com/sun/star/uno/Exception.hpp>
  22 #include <com/sun/star/uno/Reference.hxx>
  23 #include <com/sun/star/uno/RuntimeException.hpp>
  24 #include <com/sun/star/uno/Sequence.hxx>
  25 #include <com/sun/star/uno/XComponentContext.hpp>
  26 #include <com/sun/star/uno/XInterface.hpp>
  27 #include <com/sun/star/uri/XExternalUriReferenceTranslator.hpp>
  28 #include <cppuhelper/implbase.hxx>
  29 #include <cppuhelper/supportsservice.hxx>
  30 #include <cppuhelper/weak.hxx>
  31 #include <osl/thread.h>
  32 #include <rtl/string.h>
  33 #include <rtl/textenc.h>
  34 #include <rtl/uri.h>
  35 #include <rtl/uri.hxx>
  36 #include <rtl/ustrbuf.hxx>
  37 #include <rtl/ustring.hxx>
  38 #include <sal/types.h>
  39
  40 namespace {
  41
  42 class Translator:
  43     public cppu::WeakImplHelper<
  44         css::lang::XServiceInfo, css::uri::XExternalUriReferenceTranslator>
  45 {
  46 public:
  47     Translator() {}
  48
  49     Translator(const Translator&) = delete;
  50     Translator& operator=(const Translator&) = delete;
  51
  52     virtual OUString SAL_CALL getImplementationName() override;
  53
  54     virtual sal_Bool SAL_CALL supportsService(OUString const & serviceName) override;
  55
  56     virtual css::uno::Sequence< OUString > SAL_CALL
  57     getSupportedServiceNames() override;
  58
  59     virtual OUString SAL_CALL
  60     translateToInternal(OUString const & externalUriReference) override;
  61
  62     virtual OUString SAL_CALL
  63     translateToExternal(OUString const & internalUriReference) override;
  64
  65 private:
  66     virtual ~Translator() override {}
  67 };
  68
  69 OUString Translator::getImplementationName()
  70 {
  71     return OUString("com.sun.star.comp.uri.ExternalUriReferenceTranslator");
  72 }
  73
  74 sal_Bool Translator::supportsService(OUString const & serviceName)
  75 {
  76     return cppu::supportsService(this, serviceName);
  77 }
  78
  79 css::uno::Sequence< OUString > Translator::getSupportedServiceNames()
  80 {
  81     css::uno::Sequence< OUString > s { "com.sun.star.uri.ExternalUriReferenceTranslator" };
  82     return s;
  83 }
  84
  85 OUString Translator::translateToInternal(
  86     OUString const & externalUriReference)
  87 {
  88     if (!externalUriReference.matchIgnoreAsciiCase("file:/"))
  89     {
  90         return externalUriReference;
  91     }
  92     sal_Int32 i = RTL_CONSTASCII_LENGTH("file:");
  93     OUStringBuffer buf;
  94     buf.append(externalUriReference.getStr(), i);
  95     // Some environments (e.g., Java) produce illegal file URLs without an
  96     // authority part; treat them as having an empty authority part:
  97     if (!externalUriReference.match("//", i))
  98     {
  99         buf.append("//");
 100     }
 101     rtl_TextEncoding encoding = osl_getThreadTextEncoding();
 102     for (bool path = true;;) {
 103         sal_Int32 j = i;
 104         while (j != externalUriReference.getLength()
 105                && externalUriReference[j] != '#'
 106                && (!path || externalUriReference[j] != '/'))
 107         {
 108             ++j;
 109         }
 110         if (j != i) {
 111             OUString seg(
 112                 rtl::Uri::encode(
 113                     rtl::Uri::decode(
 114                         externalUriReference.copy(i, j - i),
 115                         rtl_UriDecodeStrict, encoding),
 116                     rtl_UriCharClassPchar, rtl_UriEncodeStrict,
 117                     RTL_TEXTENCODING_UTF8));
 118             if (seg.isEmpty()) {
 119                 return OUString();
 120             }
 121             buf.append(seg);
 122         }
 123         if (j == externalUriReference.getLength()) {
 124             break;
 125         }
 126         buf.append(externalUriReference[j]);
 127         path = externalUriReference[j] == '/';
 128         i = j + 1;
 129     }
 130     return buf.makeStringAndClear();
 131 }
 132
 133 OUString Translator::translateToExternal(
 134     OUString const & internalUriReference)
 135 {
 136     if (!internalUriReference.matchIgnoreAsciiCase("file://"))
 137     {
 138         return internalUriReference;
 139     }
 140     sal_Int32 i = RTL_CONSTASCII_LENGTH("file://");
 141     OUStringBuffer buf;
 142     buf.append(internalUriReference.getStr(), i);
 143     rtl_TextEncoding encoding = osl_getThreadTextEncoding();
 144     for (bool path = true;;) {
 145         sal_Int32 j = i;
 146         while (j != internalUriReference.getLength()
 147                && internalUriReference[j] != '#'
 148                && (!path || internalUriReference[j] != '/'))
 149         {
 150             ++j;
 151         }
 152         if (j != i) {
 153             // Use rtl_UriDecodeToIuri -> rtl_UriEncodeStrictKeepEscapes instead
 154             // of rtl_UriDecodeStrict -> rtl_UriEncodeStrict, so that spurious
 155             // non--UTF-8 octets like "%FE" are copied verbatim:
 156             OUString seg(
 157                 rtl::Uri::encode(
 158                     rtl::Uri::decode(
 159                         internalUriReference.copy(i, j - i),
 160                         rtl_UriDecodeToIuri, RTL_TEXTENCODING_UTF8),
 161                     rtl_UriCharClassPchar, rtl_UriEncodeStrictKeepEscapes,
 162                     encoding));
 163             if (seg.isEmpty()) {
 164                 return OUString();
 165             }
 166             buf.append(seg);
 167         }
 168         if (j == internalUriReference.getLength()) {
 169             break;
 170         }
 171         buf.append(internalUriReference[j]);
 172         path = internalUriReference[j] == '/';
 173         i = j + 1;
 174     }
 175     return buf.makeStringAndClear();
 176 }
 177
 178 }
 179
 180 extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface* SAL_CALL
 181 com_sun_star_comp_uri_ExternalUriReferenceTranslator_get_implementation(css::uno::XComponentContext* ,
 182         css::uno::Sequence<css::uno::Any> const &)
 183 {
 184     return ::cppu::acquire(new Translator);
 185 }
 186
 187 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */